CN113802474B - Construction method of half-width bridge and beam-slab stabilizing device of half-width bridge - Google Patents
Construction method of half-width bridge and beam-slab stabilizing device of half-width bridge Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及桥梁翻修施工技术领域,特别是涉及一种对老旧桥梁进行半幅保通的施工方法,以及一种配套使用的对半幅桥梁梁板的稳定装置。The invention relates to the technical field of bridge renovation construction, in particular to a construction method for half-width protection of old bridges and a supporting device for stabilizing half-width bridge girder slabs.
背景技术Background technique
对于原有道路上的桥梁进行翻修翻盖不同于在全新的道路上进行桥梁施工,很多时候还要维持原有桥梁在翻修期间具有一定的通车能力。这时候一般是进行先将其中一侧车道也就是其中半幅拆除,然后另外半幅保持通车能力,让原有的车辆全部进入保留的半幅车道进行通车。Renovation and flipping of bridges on existing roads is different from bridge construction on brand-new roads. In many cases, the original bridges have to maintain a certain traffic capacity during the renovation period. At this time, it is generally carried out to remove one side of the lane, that is, half of it, and then maintain the capacity of the other half to allow all original vehicles to enter the reserved half of the lane for traffic.
但是很多需要翻修重盖的老旧桥梁与现在的一体箱梁桥梁不同,而是采用多个梁板横向也就是左右方向拼接组成桥面。将半幅桥面进行拆除将车辆集中在另外半幅保持车辆畅通即为保通半幅施工,车流量变大,容易导致桥梁的梁板上产生较大的弯矩,或者车辆起步急刹车对桥面施加较大反作用力的情况下造成桥梁板湿接缝受力开裂,甚至整个梁板发生平移。保通的半幅桥梁在施工期间的安全难以保证。However, many old bridges that need to be rebuilt and covered are different from the current integrated box girder bridges. Instead, multiple beams and slabs are spliced horizontally, that is, in the left and right directions to form the bridge deck. Removing half of the bridge deck and concentrating the vehicles on the other half to keep the vehicles unblocked is the half-width construction. The traffic flow becomes larger, which will easily cause a large bending moment on the beam plate of the bridge, or the sudden braking of the vehicle will exert force on the bridge deck. In the case of a large reaction force, the wet joints of the bridge slab are cracked under force, and even the entire beam slab moves in translation. It is difficult to guarantee the safety of Baotong's half-width bridge during construction.
现有技术中一般应对方法是利用钢板将保通半幅桥梁的梁板直接固定为一体,钢板通过膨胀螺栓进行固定,但是这种钢钉会破坏桥梁的主体结构,容易对保通半幅桥梁造成不可逆的损伤影响保通半幅正常通车。装置也只能安装在桥梁的底面,安装施工好需要人员吊装作业十分困难,而且装置后期不易拆除。The general solution in the prior art is to use steel plates to directly fix the beam and slab of the Baotong half-width bridge as a whole, and the steel plates are fixed by expansion bolts. However, such steel nails will damage the main structure of the bridge and easily cause irreversible damage to the Baotong half-width bridge. The damage affected the normal opening of half of the pass. The device can only be installed on the bottom surface of the bridge, and it is very difficult to install and construct it, and it is difficult to lift it by personnel, and it is not easy to dismantle the device later.
发明内容Contents of the invention
本发明桥梁半幅保通施工方法。The invention relates to a construction method for bridge half width protection.
解决的技术问题是:一些有多个梁板左右拼接成桥面的老旧桥梁进行翻修施工,又要保持一定的通车能力而进行半幅保通施工时,保通的半幅桥梁梁板不稳,梁板之间的连接缝容易开裂甚至梁板发生滑移,影响桥梁安全。The technical problem to be solved is: some old bridges with multiple girders and slabs spliced left and right to form the bridge deck are being renovated, and a certain traffic capacity must be maintained. The joints between the girders and slabs are prone to cracking and even the girders and slabs slip, which affects the safety of the bridge.
为解决上述技术问题,本发明桥梁半幅保通施工方法,采用如下方案。In order to solve the above-mentioned technical problems, the construction method of half width of the bridge of the present invention adopts the following scheme.
一种桥梁半幅保通施工方法,其针对桥面由多个梁板横向拼接的桥梁进行半幅保通施工作业,所述桥梁半幅保通施工方法包括以下步骤:A bridge half-width protection construction method, which performs half-width protection construction operations on bridges whose bridge decks are horizontally spliced by a plurality of beam slabs, and the bridge half-width protection construction method includes the following steps:
步骤一:将旧桥梁其中一侧车道拆除并记为拆除半幅,将旧桥梁另外一侧车道保留不动并记为保通半幅;Step 1: Remove one side of the lane of the old bridge and record it as demolition half, keep the other side of the old bridge as it is and record it as the half lane;
步骤二:从保通半幅桥面的左右两侧施加向内的挤压应力;Step 2: Apply inward extrusion stress from the left and right sides of Baotong half bridge deck;
步骤三:在拆除半幅的原位置对新桥梁的其中半幅车道进行施工;Step 3: Construct half of the lanes of the new bridge at the original position where the half was removed;
步骤四:新桥梁的半幅车道通车后,撤销对旧桥梁的保通半幅施加的挤压应力;Step 4: After the half lane of the new bridge is opened to traffic, cancel the extrusion stress applied to the half lane of the old bridge;
步骤五:拆除旧桥梁的保通半幅,并在原位置修建新桥梁的另外半幅车道。Step 5: Remove the traffic protection half of the old bridge, and build the other half lane of the new bridge in its original position.
优选的,在步骤二中采用梁板稳定装置进行挤压应力的加载,在所述梁板的长度方向间隔设置多个梁板稳定装置;所述梁板稳定装置包括能够分别固定在保通半幅的桥面左右两侧的两个固定卡,两个所述固定卡通过收紧机构连接,所述收紧机构设置在所述梁板的下方,所述收紧机构拉紧两个所述固定卡即可对保通半幅施加向内的挤压应力。Preferably, in
优选的,在步骤二中,对所述固定卡位置的保通半幅的桥面进行修整,以使所述固定卡与桥面受力均匀。Preferably, in
优选的,步骤一中桥梁所述梁板的拆除作业从所述拆除半幅的临边一侧开始逐步向保通一侧依次进行;所述梁板的拆除作业前将拆除半幅桥面的沥青路面进行切割分离作业,且沿着所述梁板之间的拼接缝进行切割。Preferably, in
优选的,步骤一中所述沥青路面的切割分离作业之前,将拆除半幅两端的所述沥青路面刨开暴露出梁板拼接缝的位置;根据桥面的侧边和已经暴露的桥梁拼接缝位置,在所述沥青路面上对梁板拼接缝位置进行划线,然后沿划线切割分离沥青路面。Preferably, before the cutting and separation of the asphalt pavement described in
优选的,在步骤三中新桥梁与旧桥路的保通半幅留有间隙,间隙范围不小于10cm,具体可以根据实际的设计情况决定。以避免新桥梁与保通半幅直接接触。Preferably, in
优选的,在步骤五中,对保通半幅的桥墩按照从上到下进行拆除。Preferably, in Step 5, the bridge piers with half-width protection are removed from top to bottom.
同时本发明还提出了了一种专门对保通的半幅桥梁进行梁板加固的半幅桥梁梁板稳定装置,采用如下方案。Simultaneously, the present invention also proposes a beam-slab stabilizing device for a half-width bridge specially for reinforcing the half-width bridge of Baotong, and adopts the following scheme.
半幅桥梁梁板稳定装置,用于桥面由多个梁板横向拼接的桥梁进行半幅保通施工作业时,对保通半幅的桥梁的梁板向内施加挤压应力,Half bridge girder slab stabilizing device is used to apply extrusion stress inward to the girder slab of the half-width bridge when the bridge deck is horizontally spliced by multiple beams and slabs for half-width protection construction.
所述梁板稳定装置包括能够固定在桥面侧边上的两个固定卡,两个固定卡通过收紧机构连接,The beam plate stabilizing device includes two fixing cards that can be fixed on the side of the bridge deck, and the two fixing cards are connected by a tightening mechanism,
两个固定卡分别安装在桥梁保通半幅的左右两侧,收紧机构位于桥梁下方且两端分别连接保通半幅两侧的固定卡,所述收紧机构能够伸长和收缩以调节两个固定卡的间距进而向保通半幅的桥面施加向内的挤压应力。The two fixing cards are respectively installed on the left and right sides of the half width of the bridge. The tightening mechanism is located under the bridge and the two ends are respectively connected to the fixing cards on both sides of the half width of the bridge. The tightening mechanism can be stretched and contracted to adjust the two The spacing of the fixing cards further applies an inward extrusion stress to the half-width bridge deck.
优选的,所述固定卡呈U型,与桥梁保通半幅的左右侧边契合,固定卡的内缘带有防滑纹理;临边一侧的固定卡的一边卡在桥面的流水孔内,或者通过在桥梁护栏上开槽,并使固定卡的一边卡在开槽内,另外一侧的固定卡上安装有护栏。Preferably, the fixed card is U-shaped, fits with the left and right sides of the half width of the bridge, and the inner edge of the fixed card has a non-slip texture; one side of the fixed card on the adjacent side is stuck in the water hole of the bridge deck, Or by slotting on the bridge guardrail, and one side of the fixing card is stuck in the slot, and a guardrail is installed on the fixing card on the other side.
优选的,所述收紧机构为带有紧绳器的钢丝绳,所述紧绳器设置在桥梁临边一侧,钢丝绳的两端固定在桥梁临边一侧的固定卡上,另一侧的固定卡的下部安装有滑轮,钢丝绳绕过所述滑轮。Preferably, the tightening mechanism is a wire rope with a rope tightener, and the rope tightener is arranged on one side of the bridge, the two ends of the wire rope are fixed on the fixing clips on the side of the bridge, and the other side The bottom of the fixed card is equipped with a pulley, and the wire rope walks around the pulley.
本发明桥梁半幅保通施工方法与现有技术相比,具有如下有益效果:Compared with the prior art, the construction method of bridge half width protection in the present invention has the following beneficial effects:
这种多个梁板左右横向拼接成桥面的桥梁在支撑结构的左右两侧都有阻挡结构,避免最外侧的梁板向外运动,然后整个桥面中间的梁板利用两侧的梁板进行约束保持整个桥面所有梁板位置固定。现在对这种桥梁进行半幅保通施工会将其中半幅桥梁进行拆除,这时候暴露在最外侧的梁板就失去了原有梁板的约束,在受力较大的情况下不可避免的发生移动。This kind of bridge with multiple beams and slabs spliced horizontally to form a bridge deck has blocking structures on the left and right sides of the support structure to prevent the outermost beams and slabs from moving outwards, and then the beams and slabs in the middle of the entire bridge deck use the beams and slabs on both sides Constraints are used to keep the position of all beams and slabs on the entire bridge deck fixed. At present, the half-width construction of this kind of bridge will remove the half-width bridge. At this time, the beams and slabs exposed on the outermost side will lose the constraints of the original beams and slabs, and will inevitably move under the condition of large force. .
现在本发明中在其中半幅桥梁拆除之后,对于保留下来的半幅桥梁的桥面从左右两侧施加向内的加压应力,这时候拆除半幅桥梁后裸露出来的梁板就会周到挤压的作用力,避免梁板移动。In the present invention, after the half-width bridge is dismantled, inward compressive stress is applied to the bridge deck of the remaining half-width bridge from the left and right sides. At this time, the beam slab exposed after the half-width bridge is removed will fully squeeze force to avoid movement of the slab.
对于整个施工过呈是首先拆除一半桥梁,保留剩下的一般作为保通半幅,保通半幅通过施加挤压应力的方式进行加固,同时将车辆引导到保通半幅上,保持道路的一定通行能力。然后为了与两端道路对齐,在原有位置上进行新桥路的其中半幅进行施工,等到施工完成之后新桥路的半幅可以通车之后,再讲车辆引导到新桥梁已经施工好的半幅桥梁上。然后撤下保通半幅上施加的作用力,并且拆除旧桥梁的保通半幅。在对新桥梁的另外半幅进行施工。这样在整个桥梁的施工过程中过程中始终保持原来道路的基本通行能力。避免道路直接阻断影响交通。For the entire construction process, half of the bridge is first demolished, and the rest is generally used as the half-baffle. The half-baffle is reinforced by applying extrusion stress, and vehicles are guided to the half-baffle to maintain a certain traffic capacity of the road. . Then, in order to align with the roads at both ends, the half of Xinqiao Road will be constructed in the original position. After the construction is completed, the half of Xinqiao Road can be opened to traffic, and then the vehicles will be guided to the half of the new bridge that has been constructed. Then remove the force exerted on the retaining half, and remove the retaining half of the old bridge. Construction is underway on the other half of the new bridge. In this way, the basic traffic capacity of the original road is always maintained during the entire bridge construction process. Avoid directly blocking the road and affecting traffic.
同时本发明还提出了一种半幅桥梁梁板稳定装置,改变了原有的通过横跨在梁板接缝处,然后将钢板通过膨胀螺栓固定在梁板上的安装方式。采用收紧机构上连接两个能够卡在桥面两侧的固定卡的方式,只需要将两个固定卡连接到保通半幅的两侧,然后让收紧装置拉紧两个固定卡即可让所有的梁板聚拢为一体。避免最外侧暴露的梁板在刹车等外力作用下发生平移。同时为了避免收紧装置影响桥面上的车辆,因而将收紧装置设置在桥面下方。由于收紧装置与桥面本身没有任何连接,因此在设置是只需要利用绳索从桥的左右两侧提升到桥梁板的下表面位置,然后与固定卡连接即可。或者直接将整个梁板固定装置从桥下提升上来,然后把固定卡安装在保通半幅的侧边上,在拉紧收紧装置。Simultaneously, the present invention also proposes a half-width bridge girder slab stabilizing device, which changes the original installation method of crossing the girder slab joints and then fixing the steel plate to the girder slab through expansion bolts. Using the method of connecting two fixed cards that can be stuck on both sides of the bridge deck on the tightening mechanism, only need to connect the two fixed cards to both sides of the half-width protection, and then let the tightening device tighten the two fixed cards. Let all the beams and slabs come together as one. Avoid translation of the outermost exposed beam plate under the action of external forces such as brakes. At the same time, in order to prevent the tightening device from affecting the vehicles on the bridge deck, the tightening device is arranged below the bridge deck. Since the tightening device has no connection with the bridge deck itself, it only needs to use ropes to lift from the left and right sides of the bridge to the lower surface of the bridge slab, and then connect with the fixing clip. Or directly lift the entire beam-slab fixing device from under the bridge, and then install the fixing card on the side of the half-width guarantee, and tighten the tightening device.
该方案设置简单,拆装方便,避免了在桥梁板上打孔作业对桥梁的结构造成的影响,同时也避免了在桥梁下表面作业不便的问题。The scheme is simple to set up, easy to disassemble and assemble, and avoids the impact on the structure of the bridge caused by the drilling operation on the bridge slab, and also avoids the problem of inconvenient operation on the lower surface of the bridge.
附图说明Description of drawings
图1是本发明半幅桥梁梁板稳定装置安装后的截面图;Fig. 1 is the sectional view after the installation of half-width bridge girder slab stabilizing device of the present invention;
图2是图1临边一侧的固定卡和紧绳器部位的示意图;Fig. 2 is a schematic diagram of the fixed card and the rope tightener on the side of Fig. 1;
图3是图2中A处的放大图;Fig. 3 is the enlarged view of place A in Fig. 2;
图4是图1中另外一侧固定卡位置的示意图。FIG. 4 is a schematic diagram of the position of the fixing card on the other side in FIG. 1 .
附图标记说明:1-梁板,2-固定卡,3-收紧机构,3a-钢丝绳,3b-紧绳器。Explanation of reference signs: 1-beam plate, 2-fixing card, 3-tightening mechanism, 3a-steel wire rope, 3b-rope tightening device.
具体实施方式Detailed ways
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本发明,并不用于限制本发明。Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
在本发明中,在未作相反说明的情况下,使用的方位词如“上、下、左、右”通常是指参考附图1所示的上、下、左、右;“内、外”是指相对于各部件本身的轮廓的内、外。下面将参考附图并结合实施方式来详细说明本发明。In the present invention, in the case of not stating otherwise, the orientation words used generally refer to the upper, lower, left and right shown in accompanying drawing 1 as "up, down, left and right"; "inner and outer "Refers to the inside and outside of the outline of each part itself. The present invention will be described in detail below with reference to the drawings and in combination with embodiments.
为了解决一些有多个梁板1左右拼接成桥面的老旧桥梁进行翻修施工,又要保持一定的通车能力而进行半幅保通施工时,保通的半幅桥梁梁板1不稳,梁板1之间的连接缝容易开裂甚至梁板1发生滑移,影响桥梁安全的问题。In order to solve the renovation construction of some old bridges with multiple beams and slabs spliced into bridge decks, and to maintain a certain traffic capacity, when carrying out half-width protection construction, the half-width bridge beams and
本发明提出了一种专门针对桥面由多个梁板1横向拼接的桥梁进行半幅保通施工作业的桥梁半幅保通施工方法,包括以下步骤:The present invention proposes a bridge half-width protection construction method for bridges whose bridge decks are horizontally spliced by a plurality of
步骤一:将旧桥梁其中一侧车道拆除并记为拆除半幅,将旧桥梁另外一侧车道保留不动并记为保通半幅;Step 1: Remove one side of the lane of the old bridge and record it as demolition half, keep the other side of the old bridge as it is and record it as the half lane;
步骤二:从保通半幅桥面的左右两侧施加向内的挤压应力;Step 2: Apply inward extrusion stress from the left and right sides of Baotong half bridge deck;
步骤三:在拆除半幅的原位置对新桥梁的其中半幅进行施工,Step 3: Construct half of the new bridge at the original position where the half was removed,
步骤四:新桥梁的半幅车道通车后,撤销对保通半幅桥面的挤压应力;Step 4: After the half-width lane of the new bridge is opened to traffic, cancel the extrusion stress on the half-width bridge deck;
步骤五:拆除旧桥梁的保通半幅,并在原址修建新桥梁的另外半幅。Step 5: Remove the Baotong half of the old bridge and build the other half of the new bridge on the original site.
这里的拆除半幅和保通半幅仅仅是为了表述方便所做的定义,并不代表在实际施工中,桥梁的某一侧一定是拆除半幅或者保通半幅,可以根据实际情况来确定将哪一侧先拆除那一侧进行保留。然后先拆除的一侧即为拆除半幅,另外一侧就是保通半幅。在拆除半幅拆除后,将原有过桥的车辆行人全部引导到保通半幅上,保持桥梁的基本通行能力。The demolition of the half-width and the protection of the half-width here are just definitions for the convenience of expression, and it does not mean that in actual construction, one side of the bridge must be demolished or the half-width of the bridge can be determined according to the actual situation. Remove that side first to keep it. Then the side that is removed first is the removal of the half-width, and the other side is the half-width protection. After the demolition of the half-panel, all the vehicles and pedestrians crossing the bridge will be guided to the guaranteed traffic half-panel to maintain the basic traffic capacity of the bridge.
在拆除半幅的梁板1拆除之后随即,对保留半幅的两侧施加挤压应力。这个挤压应力可以在保留半幅因为拆除半幅梁板1拆除后暴露出的梁板1的侧面上采用千斤顶或者楔块等方式向着保通半幅的方向施加作用力,然后桥梁侧边原有的阻挡结构施加反作用力来完成整个从两侧向内施加挤压应力的目标。但是很多情况下拆除半幅一侧不具备安装千斤顶等设备的条件。就通过同一个装置同时夹紧保通半幅的两侧,然后这个装置向内加压,同样的也可以对保通半幅施加挤压应力。Immediately after the
然后在步骤三种为了新桥梁能够与原来的道路重新连接,所以在拆除半幅的原址建造新桥梁的其中半幅。新桥梁设计应当采用两个半幅单独支撑的结构。Then in step three, in order to reconnect the new bridge with the original road, half of the new bridge is built on the original site where half of the bridge was demolished. New bridge designs should use two halves of independently supported structure.
步骤四中新桥梁的半幅完成与道路连接并通车之后,便将道路上原来在旧桥梁的保通半幅的通行功能转移到新桥梁已经通车的半幅上。然后即可拆除旧桥梁的保通半幅,然后在拆除的保通半幅的原址上进行新桥梁的另外半幅的施工。In Step 4, after the half of the new bridge is connected to the road and opened to traffic, the traffic function of the original half of the old bridge on the road will be transferred to the half of the new bridge that has been opened to traffic. Then the guaranteed and connected half of the old bridge can be removed, and then the construction of the other half of the new bridge can be carried out on the original site of the removed protected and connected half.
具体地,在步骤二中采用梁板稳定装置进行挤压应力的加载,在梁板1的长度方向间隔设置多个梁板稳定装置;Specifically, in
所述梁板稳定装置包括能够分别固定在保通半幅的桥面左右两侧的两个固定卡2,两个固定卡2通过收紧机构3连接,所述收紧机构3设置在梁板1下方,收紧机构3拉紧两个固定卡2即可对保通半幅施加向内的挤压应力。这个收紧装置可以是附图中的钢丝绳3a与钢丝绳3a的张紧机构,或者可以采用双头丝杠等等只要能伸长收缩的装置即可。The beam-slab stabilizing device includes two
优选的,对所述固定卡2位置的所述保通半幅的桥面进行修整,让固定卡2与桥面受力均匀。固定卡2根据桥梁所要安装位置的具体情况决定,需要与桥面契合。但是桥面上因为沥青路面或者梁板1拼接缝的湿接缝上会有混凝土残留,影响固定卡2与桥梁桥面的安装和受力。Preferably, the half-width bridge deck at the position of the fixing
步骤一中桥梁所述梁板1的拆除作业从所述拆除半幅的临边一侧开始逐步向保通一侧依次进行;所述梁板1的拆除作业前将拆除半幅桥面的沥青路面进行切割分离作业,且沿着所述梁板1之间的拼接缝进行切割。由于老旧桥梁的两侧车道的左右两个半幅桥梁是连为一体的,所以沥青路面也是粘接为一体的。所以为了避免影响保通半幅上的沥青路面也要将沥青路面从中间切割开。同时为了拆除梁板1时方便,所以沿着梁板1的拼接缝将沥青路面切割开,让梁板1之间彻底分离。具体地,步骤一中的切割分离作业之前,将所述拆除半幅两端的所述沥青路面刨开暴露出梁板1拼接缝的位置;根据桥面的侧边和已经暴露的桥梁拼接缝位置,在所述沥青路面上对梁板1拼接缝位置进行划线,然后沿划线切割分离沥青路面。In the
在步骤三中新桥梁与旧桥路的保通半幅留有间隙避免新桥梁与保通半幅直接接触。这样避免了旧桥梁的保通半幅和新桥梁的施工半幅发生干涉碰撞,影响保通半幅的结构安全,同时避免对新桥梁半幅施工造成影响。在步骤五中,新桥梁的另外半幅优选的与预先在步骤三中施工的半幅留有间隙,采用分离式的桥梁结构。In
步骤五中,保通半幅的桥墩从上到下拆除,避免桥墩倾覆。In Step 5, the pier of Baotong half-width is removed from top to bottom to avoid the overturning of the pier.
其中在步骤三种对就桥梁的拆除半幅进行桥墩拆除时需要根据旧桥梁的实际情况确定,旧桥梁的桥墩一般有三种形式:Among them, in the third step, the pier demolition of half of the bridge needs to be determined according to the actual situation of the old bridge. The pier of the old bridge generally has three forms:
1、一个独立桥墩同时支撑左右两个半幅的桥面。这时候需要保留旧桥梁的桥墩,只将拆除反复的梁板1去掉,让桥墩继续支撑保通半幅。优选的,在拆除半幅的梁板1去除后,桥墩的一半上表面会暴露出来,对暴露出来的拆除半幅附近的桥墩上表面向下拆除一端,避免与新桥梁的梁板1盖梁等部位的施工发生干涉影响新桥梁。1. An independent pier supports the left and right half bridge decks at the same time. At this time, it is necessary to keep the pier of the old bridge, and only remove the repeated
2、两个独立的桥墩分别支撑左右两个半幅的梁板1,这种情况比较容易处理,只需要将拆除半幅的支撑桥墩直接拆除,再进行新桥梁的施工。然后保通半幅的桥墩不作处理。2. Two independent bridge piers respectively support the left and right half beams and
3、三个桥墩支撑左右两个桥梁的左右两个半幅的梁板1。这种情况比较少见,但是处理方法结合前两种,将拆除半幅最外侧的桥墩进行拆除,保留位于最中间同时支撑左右两个半幅的桥墩,同时保留中间的桥墩和保通半幅的桥墩,并且拆除半幅的梁板1去除后,中间的桥墩暴露出来的部位也向下拆除一段距离。3. The three bridge piers support the
本发明配合步骤二,对桥面保通半幅施加向内的挤压应力,提出了一种半幅桥梁梁板稳定装置,方案如下。In conjunction with
用于桥面由多个梁板1横向拼接的桥梁进行半幅保通施工作业时,对保通半幅的桥梁的梁板1向内施加挤压应力,所述梁板稳定装置包括能够固定在桥面侧边上的两个固定卡2,两个固定卡2通过收紧机构3连接,It is used to apply compressive stress inward to the
两个固定卡2分别安装在桥梁保通半幅的左右两侧,收紧机构3位于桥梁下方且两端分别连接保通半幅两侧的固定卡2,所述收紧机构3能够伸长和收缩以调节两个固定卡2的间距进而向保通半幅的桥面施加向内的挤压应力。Two
同时本发明还提出了一种半幅桥梁梁板稳定装置,改变了原有的通过横跨在梁板1接缝处,然后将钢板通过膨胀螺栓固定在梁板1上的安装方式。采用收紧机构3上连接两个能够卡在桥面两侧的固定卡2的方式,只需要将两个固定卡2连接到保通半幅的两侧,然后让收紧装置拉紧两个固定卡2即可让所有的梁板1聚拢为一体。避免最外侧暴露的梁板1在刹车等外力作用下发生平移。同时为了避免收紧装置影响桥面上的车辆,因而将收紧装置设置在桥面下方。由于收紧装置与桥面本身没有任何连接,因此在设置是只需要利用绳索从桥的左右两侧提升到桥梁板1的下表面位置,然后与固定卡2连接,即可。或者直接将整个梁板1固定装置从桥下提升上来,然后把固定卡2安装在保通半幅的侧边上,在拉紧收紧装置。Simultaneously, the present invention also proposes a half-width bridge girder-slab stabilizing device, which changes the original installation method of crossing the joints of the girder-
具体地,固定卡2就是能够卡在桥梁桥面或者梁板1的侧边上,然后向固定施加向内的外力时,固定卡2能够将外力传导到桥梁的梁板1上即可,并不拘泥与某种具体的表现形式。固定卡2的外力通过收紧机构3施加,收紧机构3在收缩运动的时候同时对两个固定卡2施加朝向桥梁内侧的作用力。收紧机构3是一个能够收缩和舒张同时在收缩过程中施加拉力并且保持拉力的机构。可以是丝杠,或者液压机构,但是丝杠或者液压都较为沉重而且成本较高,并不是个本发明的使用场合。因此本发明中优选的采用带有紧绳器3b的钢丝绳3a,紧绳器3b可以让钢丝绳3a收缩或者伸长,钢丝绳3a直接对两个固定卡2施加拉力,紧绳器3b直接安装在钢丝绳3a上可以是如图2中所示的手摇式收线器,然后用棘轮进行固定保持拉力,也可以是任意一种钢丝绳3a紧绳器3b,这个只需要能够拉紧钢丝绳3a并固定即可。优选的为了操作方便,所述紧绳器3b设置在桥梁临边一侧的,进一步优选的,钢丝绳3a的两端固定在桥梁临边一侧的固定卡2上,另一侧的固定卡2的下部安装有滑轮,钢丝绳3a绕过所述滑轮。或者也可以如图2中所示的,用一根或者多跟钢丝,钢丝绳3a的两端直接连接两个固定卡2。优选的根据所选紧绳器3b的种类也可以将紧绳器3b固定在固定卡2上,然后钢丝绳3a的一端连接在紧绳器3b上,另外一端连接另外一个固定卡2。Specifically, the
所述固定卡2呈U型,与桥梁保通半幅的左右侧边契合,固定卡2的内缘带有防滑纹理;防滑纹理避免固定卡2脱落。临边一侧的固定卡2的一边卡在桥面的流水孔内,或者在桥梁护栏上开槽固定卡2的一边卡在开槽内,或者如图2中所示的在桥梁自身的护栏比较坚固的情况下,也可以直接将临边一侧的固定卡2固定在护栏上。另外一侧比较简单,如图3中所示的,直接卡在裸露的梁板1上即可。The
如图2中所示的,所述固定卡2上带有安装座,安装座作为护栏的安装基础。护栏同时为桥梁暴露一侧提供安全保证。As shown in FIG. 2 , the fixing
因为钢丝绳3a难以避免的会在梁板1上发生弯折,所以钢丝绳3a在梁板1上的折线处垫有垫板用于分散钢丝绳对梁板的压力。Because the wire rope 3a will inevitably be bent on the
所述固定卡2呈U型,包括上板、下板和侧板,侧板的上下两端分别连接上板和下板的侧边;所述固定卡2的材质为金属。The
以上所述的实施例仅仅是对本发明的优选实施方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案做出的各种变形和改进,均应落入本发明权利要求书确定的保护范围内。The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. All such modifications and improvements should fall within the scope of protection defined by the claims of the present invention.
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